Title:

Experimental Study on Energy Dissipation of Electrolytes in Nanopores

Author(s):

Zhao, Jianbing
Culligan, Patricia J.
Germaine, John T.
Chen, Xi

Date:

2009

Type:

Articles

Department:

Civil Engineering and Engineering Mechanics

Volume:

25

Permanent URL:

http://hdl.handle.net/10022/AC:P:10465

Book/Journal Title:

Langmuir

Notes:

Reprinted with permission from Environmental Science & Technology. Copyright 2009 American Chemical Society.

Abstract:

When a nonwetting fluid is forced to infiltrate a hydrophobic nanoporous solid, the external mechanical work is partially dissipated into thermal energy and partially converted to the liquid−solid interface energy to increase its enthalpy, resulting in a system with a superior energy absorption performance. To clarify the energy dissipation and conversion mechanisms, experimental infiltration and defiltration tests of liquid/ion solutions into nanopores of a hydrophobic ZSM-5 zeolite were conducted. The characteristics of energy dissipation were quantified by measuring the temperature variation of the immersed liquid environment and compared against that estimated from pressure−infiltration volume isotherms during infiltration and defiltration stages of the test. Both stages were observed to be endothermic, with the temperature of the liquid phase showing a steady increase with changes in liquid saturation. The confinement of the molecular-sized pore space causes the liquid molecules/ions to transit between statuses of orderly and disorderly motions, resulting in dissipation behaviors that vary with liquid infiltration/defiltration rates and the types and concentrations of additive electrolytes in the liquid—both factors of which alter the characteristics of the nanofluidic transport behavior.

Subject(s):

Nanoscience

DOI:

http://dx.doi.org/10.1021/la901696t

Item views:

197

Metadata:

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